不要拒绝他们假如你也能帮忙，否则他们不会再给你答案了。
Don't spurn them if you can help it - they will not want to give you an answer again.
假如你要搜索PDF格式的白皮书，那这个简单的操作符就是答案，多么快啊。
Say you are conducting research online and need to find whitepapers that are typically stored in PDF format, this simple Google operator is the answer… a true time saver for online research.
这里有条经验法则可供你参考：假如你不得不通过向别人请教问题才能得到答案的话，那么这就说明你不是聪明的人。
Here's a good rule of thumb: If you have to ask the question, you aren't.
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